package com.mmall.service.impl;

import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.mmall.common.ServerResponse;
import com.mmall.dao.CategoryMapper;
import com.mmall.pojo.Category;
import com.mmall.service.ICategoryService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.util.Set;

/**
 * Created by liuzhu on 2018/10/13.
 */
@Service("iCategoryService")
public class CategoryServiceImpl implements ICategoryService {

    private Logger logger = LoggerFactory.getLogger(CategoryServiceImpl.class);

    @Autowired
    private CategoryMapper categoryMapper;

    public ServerResponse addCategory(String categoryName,Integer parentId){
        if (parentId == null || org.apache.commons.lang3.StringUtils.isBlank(categoryName)){
            return ServerResponse.createByErrorMessage("添加品类参数错误");
        }
        Category category = new Category();
        category.setName(categoryName);
        category.setParentId(parentId);
        category.setStatus(true);   //这个分类是可用的

        int rowCount = categoryMapper.insert(category);
        if (rowCount>0){
            return ServerResponse.createBySuccessMessage("添加品类成功");
        }
        return ServerResponse.createByErrorMessage("添加品类失败");
    }

    public ServerResponse updateCategoryName(Integer categoryId,String categoryName){
        if (categoryId == null || org.apache.commons.lang3.StringUtils.isBlank(categoryName)){
            return ServerResponse.createByErrorMessage("更新品类的参数错误");
        }
        Category category = new Category();
        category.setId(categoryId);
        category.setName(categoryName);
        int rowCount = categoryMapper.updateByPrimaryKeySelective(category);
        if (rowCount>0){
            ServerResponse.createBySuccess("更新品类名字成功");
        }
        return ServerResponse.createByErrorMessage("更新品类名字失败");
    }

    public ServerResponse<java.util.List<Category>> getChildrenParallelCategory(Integer categoryId){
        java.util.List<Category>categoryList = categoryMapper.selectCategoryChildrenByParentId(categoryId);
        if (CollectionUtils.isEmpty(categoryList)){
            logger.info("未找到当前分类的子分类");
        }
        return ServerResponse.createBySuccess(categoryList);
    }

    public ServerResponse<java.util.List<Integer>> selecCategoryAndChildrenById(Integer categoryId){
        Set<Category>categorySet = Sets.newHashSet();
        findChildCategory(categorySet,categoryId);
        java.util.List<Integer> categoryIdList = Lists.newArrayList();
        if (categoryId != null){
            for (Category categoryItem:categorySet){
                categoryIdList.add(categoryItem.getId());
            }
        }
        return ServerResponse.createBySuccess(categoryIdList);
    }
    private Set<Category> findChildCategory(Set<Category>categorySet, Integer categoryId){
        Category category = categoryMapper.selectByPrimaryKey(categoryId);
        if (category != null){
            categorySet.add(category);
        }
        java.util.List<Category> categoryList = categoryMapper.selectCategoryChildrenByParentId(categoryId);
        for (Category categoryItem:categoryList){
            findChildCategory(categorySet,categoryItem.getId());
        }
        return categorySet;
    }




}
